1. Amcor Plc
2. BELLMER GmbH
3. Billerud AB
4. Borealis AG
5. Carton Service Inc.
6. Cascades Inc.
7. Clearwater Paper Corporation
8. Elopak AS
9. International Paper Company
10. ITC Limited
11. Kimberly-Clark Corporation
12. Kraft Group LLC
13. Liquibox Corporation
14. Modi International
15. Mondi PLC
16. Ningbo Sure Paper Co. Ltd.
17. Nippon Paper Industries Co. Ltd.
18. Oji Holdings Corporation
19. Pactiv Evergreen Inc.
20. SIG Group AG
21. Smurfit Kappa Group PLC
22. Stora Enso Oyj
23. tesa SE
24. Tetra Pak International SA
25. The Dow Chemical Company
26. UFlex Limited
27. UPM-Kymmene Corporation
28. WestRock Company